I first saw the Juggernaut in Galactic Battlegrounds. It was a Rebel vehicle there, for some odd reason.
I want a floating speeder or two. I seem to recall that the thing on page 1 that in French is apparently called something like 'Speeder de Commandement' was supposed to be in GC, but was lost in a hard drive crash. I'd love to see it in FS as a command vehicle or transport. It could deploy ammo crates and stationary weapons and such, and repair or heal nearby units. And perhaps people could spawn near it.
And yes, I would love the Juggernaut, even as a static. Taking up position in that tower and spotting for artillery would be awesome.
"One of the bitches actually gave birth while she was attacking, and her puppies joined in on the carnage."
--the awesomeness that is Boatmurdered.